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net: cdc_ether: fix divide by 0 on bad descriptors
authorBjørn Mork <bjorn@mork.no>
Mon, 6 Nov 2017 14:37:22 +0000 (15:37 +0100)
committerDavid S. Miller <davem@davemloft.net>
Wed, 8 Nov 2017 04:42:01 +0000 (13:42 +0900)
commit2cb80187ba065d7decad7c6614e35e07aec8a974
tree5eaea6c250d176f2b2f04cf13a6708f6b495c7d4tree | snapshot
parentb5f862180d7011d9575d0499fa37f0f25b423b12commit | diff
net: cdc_ether: fix divide by 0 on bad descriptors

Setting dev->hard_mtu to 0 will cause a divide error in
usbnet_probe. Protect against devices with bogus CDC Ethernet
functional descriptors by ignoring a zero wMaxSegmentSize.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Acked-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/usb/cdc_ether.c diff | blob | history
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